gistfile1.rb

module Rack
  module Utils
    def parse_nested_query(qs, d = nil)
      params = ActiveSupport::OrderedHash.new

      (qs || '').split(d ? /[#{d}] */n : DEFAULT_SEP).each do |p|
        k, v = unescape(p).split('=', 2)
        normalize_params(params, k, v)
      end

      return params
    end
  end
end

module Rack
  module Test
    class Session
      alias_method :old_env_for, :env_for

      def env_for(path, env)
        if env[:params] && env[:params].empty?
          env[:params] = ActiveSupport::OrderedHash.new
        end

        old_env_for(path, env)
      end
    end
  end
end

class BraintreeTestApp
  def initialize(app)
    @app = app
  end
  
  def call(env)
    @env = env
    config = Braintree::Configuration.instantiate
    if request.path =~ /\/merchants\/#{config.merchant_id}\/transparent_redirect_requests$/ 
      #proxy post to braintree
      uri = URI.parse(config.protocol + "://" + config.server + ":" + 
        config.port.to_s + request.path)
      http = Net::HTTP.new(uri.host, uri.port)
      http.use_ssl = true
      http.verify_mode = OpenSSL::SSL::VERIFY_NONE
      res = http.post(uri.path, request.body.read)

      if res.code == "303"
        header_hash = res.header.to_hash
        header_hash["location"].first.gsub!("http://localhost:3000/", "http://www.example.com/")
        [303, {"location" => header_hash["location"].first}, ""]
      else
        raise "unexpected response from Braintree: expected a 303"
      end
    else
      @app.call(env)
    end
  end

  def request
    @request = Rack::Request.new(@env)
  end
end

if Rails.env.test?
  ::Rails.application.config.middleware.use BraintreeTestApp
end